ORPHA:420686
Woolly hair-palmoplantar keratoderma syndrome
Also known as: KWWH type IV · Keratoderma with woolly hair type IV · Woolly hair-palmoplantar hyperkeratosis syndrome
Publications
527
Trials
0
Interventional, condition-specific
Researchers
12
Distinct authors in sample
Gene link
KANK2
Limited
Readiness
3/6
Stages with a signal
Clinical definition (Orphanet)
Woolly hair-palmoplantar keratoderma syndrome is a very rare, epidermal disorder characterized by hypotrichosis/woolly scalp hair, sparse body hair, eyelashes and eyebrows, leukonychia, and striate palmoplantar keratoderma (more severe on the soles than the palms), which progressively worsens with age. Pseudo ainhum of the fifth toes was also reported. Although woolly hair-palmoplantar keratoderma syndrome shares clinical similarities with both Naxos disease and Carvajal syndrome, is notably absent.
How rare: <1 / 1 000 000 — fewer than one in a million. In a city the size of Kolkata, that might mean on the order of fifteen people.
Cross-references
Joined from Mondo / Orphanet. MeSH labels may enter searches; UMLS / OMIM / NCIT are stored for reference.
- MONDO:0014492
- OMIM:616099
- UMLS:C4015202
Additional Mondo synonyms (4)
keratoderma with woolly hair type IV · keratoderma with wooly hair type IV · woolly hair-palmoplantar hyperkeratosis syndrome · wooly hair-palmoplantar hyperkeratosis syndrome
Research stages
Trial readiness signals
Where this condition sits on an open-data research pipeline — not how close a treatment is, and not medical advice. Empty stages often mean “not in these databases under this Mondo ID,” not “impossible.”
3/6 stages with a signal
No matched interventional trial; the gene is known and literature exists — preclinical or natural-history work may still be the practical next step.
- Gene identifiedPresent
Limited — KANK2
- LiteraturePresent
527 matched papers (445 in last 10 years) Source
- Phenotype characterisedPresent
8 HPO annotations (e.g. Leukonychia; Woolly hair; Sparse body hair) Source
- Animal modelNot found
No Alliance genotype “model of” associations via Monarch for these Mondo IDs
- Orphan designationNot found
No FDA or EMA orphan-drug designation matched this disease via UMLS or preferred name Source
- Interventional trialNot found
No matched interventional trial under our ClinicalTrials.gov rules
Biology
Genes and phenotypes
Gene–disease validity from GenCC, plus phenotypes and animal models joined from Monarch Initiative via Mondo ID — not a clinical diagnosis aid.
Do we know what causes it?
Possibly — only limited evidence so far for KANK2.
GenCC classification: Limited.
Phenotypes (Monarch / HPO)
8
Associated phenotypes · MONDO:0014492
- Leukonychia
- Woolly hair
- Sparse body hair
- Sparse scalp hair
- Amniotic constriction ring
Showing 5 of 8 — open Monarch for the full list.
Animal models (Monarch / Alliance)
None returned for this Mondo ID. Empty here is not proof that no model organism work exists under another name or gene.
Monarch fetch 2026-07-29
Therapies
Designations, candidates, and chemicals
FDA OOPD and EMA orphan designations, Open Targets clinical candidates, and CTD chemical associations via MyDisease.info. These never change the interventional-trial headline.
Orphan designation (FDA · EMA)
No designation matched this disease via UMLS or preferred name on the FDA OOPD mirror or EMA orphan register. Absence here is not proof that none exists under another wording.
Open Targets candidates
No drugs or clinical candidates returned for this Mondo ID on Open Targets.
CTD chemicals (MyDisease.info)
No CTD chemical associations returned for this Mondo ID.
Literature
Is anyone studying this?
527
527 papers have been published on this condition. That is a real research literature — still far smaller than common diseases (breast cancer: over 700,000 papers). Median papers in the last 10 years for a rare disease in this dataset (publications denominator n=3967) is 59.
527 papers since the earliest indexed year in this search — median last-10-year count for a rare disease in this dataset is 59 (publications denominator n=3967).
445 in the last 10 years · low confidence
Phrase hits: 2 · MeSH hits: 0
Who's working on it?
12
Distinct author names in 2 sampled papers — named people below.
Who's working on it?
No interventional trial matched this name; these authors publish on it in the sampled literature — a practical starting point for contact.
- 01Agarwal A1 paper · 2021
Department of DVL, IMS and SUM Hospital, Bhubaneswar, Odisha E-mail: akash.22.1995@gmail.com.
Papers in Europe PMC - 02Ananthakrishnan V1 paper · 2026
Intern, Department of DVL, Indira Gandhi Medical College and Research Institute, Pondicherry, India.
Papers in Europe PMC - 03Banushree CS1 paper · 2026
Professor, Department of Pathology, Indira Gandhi Medical College and Research Institute, Pondicherry, India.
Papers in Europe PMC - 04Cadiravane S1 paper · 2026
Intern, Department of DVL, Indira Gandhi Medical College and Research Institute, Pondicherry, India.
Papers in Europe PMC - 05Carounanidhy U1 paper · 2026
Professor and Head, Department of DVL, Indira Gandhi Medical College and Research Institute, Pondicherry, India.
Papers in Europe PMC - 06Chockalingam SK1 paper · 2026
Senior Assistant Professor, Department of ENT, Indira Gandhi Medical College and Research Institute, Pondicherry, India, Orcid: https://orcid.org/0000-0002-5793-5515.
Papers in Europe PMC - 07Damodaran J1 paper · 2026
Junior Resident, Department of Dermatology, Venereology and Leprology, Indira Gandhi Medical College and Research Institute, Pondicherry, India.
Papers in Europe PMC - 08Hassanandani T1 paper · 2021
Department of DVL, IMS and SUM Hospital, Bhubaneswar, Odisha E-mail: akash.22.1995@gmail.com.
Papers in Europe PMC - 09Kar BR1 paper · 2021
Department of DVL, IMS and SUM Hospital, Bhubaneswar, Odisha E-mail: akash.22.1995@gmail.com.
Papers in Europe PMC - 10Mohanan S1 paper · 2026
Associate Professor, Department of Dermatology, Venereology and Leprology, Indira Gandhi Medical College and Research Institute, Pondicherry, India, Corresponding Author, Orcid: https://orcid.org/0000-0003-0923-640X.
Papers in Europe PMC
Clinical research
Is a treatment being tested?
0
interventional trials for this specific condition
No interventional trial testing a treatment matched this specific condition name on ClinicalTrials.gov (observational studies and pan-disease registries are listed separately when present).
Data as of 11 September 2026 · last trial check 11 September 2026
No matched interventional trials. This is true for 77.2% of diseases in the trials denominator (5501 of 7126). Here are the researchers publishing on it.
low confidence · 38.6th percentile (trials denominator)
Recruiting interventional trials
From the matched ClinicalTrials.gov set
No interventional trial testing a treatment was found for this specific condition name on ClinicalTrials.gov.
See who's working on it — people publishing on this disease are often the practical next contact when no trial is listed.
Other registries (secondary)
Broader net from EU CTIS, ISRCTN, and ICTRP when available — deduped against ClinicalTrials.gov IDs already counted above. Dual-model LLM relevance gates what we keep. These rows are not added to the interventional headline.
raw 0 · after dedupe 0 · already on CT.gov 0 · kept 0 · parent 0 · uncertain 0 · dropped 0 · fetched 2026-07-30
Source notes: ictrp: Error: ICTRP public search unavailable (WHO portal is SPA-only; SOAP needs partnership). Tried: https://apps.who.int/tri
No secondary-registry studies passed dual-model relevance for this condition name (after dedupe).
Where to find support
Condition-specific patient organisations, when Orphanet lists them, are on the disease’s Orphanet page. We also link umbrella groups that support undiagnosed and ultra-rare families.
Orphanet entry for Woolly hair-palmoplantar keratoderma syndrome — check Associations / patient organisations on that page.
India — NPRD
Last verified 2026-07-26This ORPHAcode is not on our curated NPRD list (direct or Mondo-parent match). That does not decide clinical eligibility; families in India should ask a notified Centre of Excellence about current coverage.
Hand-curated for this project. ORPHAcode mappings are best-effort and may be incomplete or imprecise for umbrella categories. Parent (Mondo) matches mean the policy lists a broader category — confirm eligibility with a Centre of Excellence. Financial entitlements summarised from public policy statements and may change. This is not official government guidance.
How we counted this
Europe PMC query (preferred label + any corrected label + Orphanet and Mondo exact synonyms, stoplisted; unioned with resolved MeSH labels when available). UMLS / OMIM / NCIT cross-references are stored on the overview but are not added to the query string.
("Woolly hair-palmoplantar keratoderma syndrome" OR "KWWH type IV" OR "Keratoderma with woolly hair type IV" OR "Woolly hair-palmoplantar hyperkeratosis syndrome" OR "keratoderma with wooly hair type IV" OR "wooly hair-palmoplantar hyperkeratosis syndrome") OR ("KANK2" OR "KANK2 syndrome" OR "KANK2-related")ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):
"Woolly hair-palmoplantar keratoderma syndrome" OR "KWWH type IV" OR "Keratoderma with woolly hair type IV" OR "Woolly hair-palmoplantar hyperkeratosis syndrome" OR "keratoderma with wooly hair type IV" OR "wooly hair-palmoplantar hyperkeratosis syndrome"
Study-type breakdown: 0 interventional · 0 observational · 0 expanded access. Only interventional studies enter the trial headline.
Query health: ok — strategies attempted: phrase; with hits: phrase
Run this search on ClinicalTrials.gov
Confidence reasoning
- Preferred label is multi-word and distinctive
- No synonyms dropped by stoplist
- No label/synonym collisions with other diseases in this corpus
- Publication count (527) is implausibly high for prevalence class "<1 / 1 000 000" — treat as possible over-matching, not a measure of research intensity
Ingested 2026-07-27T15:49:02.790Z